US20090317270A1 - Diaphragm foam pump - Google Patents
Diaphragm foam pump Download PDFInfo
- Publication number
- US20090317270A1 US20090317270A1 US12/488,146 US48814609A US2009317270A1 US 20090317270 A1 US20090317270 A1 US 20090317270A1 US 48814609 A US48814609 A US 48814609A US 2009317270 A1 US2009317270 A1 US 2009317270A1
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- US
- United States
- Prior art keywords
- diaphragm
- motor
- inlet
- air
- passageway
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000006260 foam Substances 0.000 title claims abstract description 41
- 239000007788 liquid Substances 0.000 claims abstract description 37
- 239000012530 fluid Substances 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 4
- 230000004913 activation Effects 0.000 description 8
- 230000007246 mechanism Effects 0.000 description 4
- 239000000344 soap Substances 0.000 description 3
- 238000013019 agitation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000645 desinfectant Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
- F04B19/04—Pumps for special use
- F04B19/06—Pumps for delivery of both liquid and elastic fluids at the same time
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K5/00—Holders or dispensers for soap, toothpaste, or the like
- A47K5/06—Dispensers for soap
- A47K5/12—Dispensers for soap for liquid or pasty soap
- A47K5/1202—Dispensers for soap for liquid or pasty soap dispensing dosed volume
- A47K5/1208—Dispensers for soap for liquid or pasty soap dispensing dosed volume by means of a flexible dispensing chamber
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K5/00—Holders or dispensers for soap, toothpaste, or the like
- A47K5/14—Foam or lather making devices
- A47K5/16—Foam or lather making devices with mechanical drive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/0018—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam
- B05B7/0025—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam with a compressed gas supply
- B05B7/0031—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam with a compressed gas supply with disturbing means promoting mixing, e.g. balls, crowns
- B05B7/0037—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam with a compressed gas supply with disturbing means promoting mixing, e.g. balls, crowns including sieves, porous members or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/0018—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam
- B05B7/005—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam wherein ambient air is aspirated by a liquid flow
- B05B7/0056—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam wherein ambient air is aspirated by a liquid flow with disturbing means promoting mixing, e.g. balls, crowns
- B05B7/0062—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam wherein ambient air is aspirated by a liquid flow with disturbing means promoting mixing, e.g. balls, crowns including sieves, porous members or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
- B05B7/26—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device
- B05B7/262—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device a liquid and a gas being brought together before entering the discharge device
Definitions
- the invention herein resides in the art of foam pumps, wherein a foamable liquid and air are mixed to generate a foam product. More particularly, the invention relates to diaphragm foam pumps wherein a diaphragm is caused to repeatedly collapse and expand by a motor driven element, thereby alternately drawing foamable liquid and air into a mixing chamber within the diaphragm and forcing the mixture out as a foam product.
- liquids such as soaps, sanitizers, cleansers, disinfectants, and the like
- the pump mechanism employed with such dispensers has typically been a liquid pump, simply dispensing a predetermined quantity of the liquid upon movement of an actuator.
- the standard liquid pump has given way to a foam generating pump, which necessarily requires means for combining the air and liquid in such a manner as to generate the desired foam.
- foam dispensers generate foam by pumping a foamable liquid stream and an air stream to a mixing area and forcing the mixture through a screen to better disperse the air as bubbles within the foamable liquid and create a more uniform foam product.
- the key to a desirable foam product is violent mixing of the foamable liquid and air to disperse the air bubbles within the liquid.
- Many existing foam pump designs employ a piston type mechanism, which results in a fixed volume of foam generated by each activation of the foam pump, without any ability to adjust. Thus, there is a need for a foam pump providing the ability to adjust the volume of foam provided by each activation of the foam pump.
- a diaphragm foam pump including a diaphragm made of a flexible material defining a mixing chamber and having an inlet opening and an outlet opening.
- An inlet passageway is in fluid communication with a reservoir containing a foamable liquid and the inlet opening, with the inlet passageway having a one-way valve therein.
- the pump also includes an outlet passageway in fluid communication with the outlet opening and having a one-way valve therein, and an air inlet in the inlet passageway having a one-way valve.
- the diaphragm foam pump further includes an electric motor and a motor-driven element associated with said electric motor.
- Actuating the electric motor drives the motor driven element to repeatedly collapse and expand the diaphragm, and where expansion of the diaphragm creates a vacuum causing foamable liquid and air to flow into the mixing chamber, and collapsing of the diaphragm causes the liquid and air mixture to be forced out through the outlet passageway as foam.
- FIG. 1 is a schematic of a dispenser according to the concepts of the present invention
- FIG. 2 is a top view of the cam according to FIG. 1 ;
- FIG. 3 is a top view of an alternate cam according to another embodiment of the present invention.
- FIG. 4 is a schematic of an alternative dispenser according to the concepts of the present invention.
- Dispenser 10 includes a foam pump 11 having a diaphragm 12 that is generally dome shaped.
- Diaphragm 12 is made of a flexible and resilient material that collapses upon the introduction of an external force, and then returns to its original shape when the force is removed. Suitable materials include, for example, silicone, thermoplastic elastomers, and the like.
- Diaphragm 12 defines an internal mixing chamber 14 therein, as will be discussed in greater detail below.
- Diaphragm 12 may be mounted in a dispenser housing (not shown) that provides a mounting mechanism, as well as a means for securing other components of dispenser 10 .
- Dispenser 10 also includes an electric motor 16 having a rotating motor shaft 18 .
- Electric motor 16 may be any known electric motor having a rotating shaft, including, for example, a DC motor provided with a battery power source 19 .
- Motor 16 may include motor drive circuitry 17 to control the activation thereof (e.g. duration, speed, etc.).
- the drive circuitry 17 of motor 16 may be actuated by a hands free activation sensor, as is known in the art.
- a cam 20 is secured to rotating shaft 18 so that rotating shaft 18 causes rotation of cam 20 .
- cam 20 is shown mounted off-center on shaft 18 so that rotation of shaft 18 is capable of generating linear force to act on diaphragm 12 , which thus functions like a cam follower.
- the cam can also be a simple center-mounted wheel with an appropriate projection, as at cam 20 ′.
- motor 16 is positioned so that shaft 18 extends adjacent to diaphragm 12 , separated therefrom by a distance chosen such that, at at least one point during full rotation of shaft 18 (and thus cam 20 ), diaphragm 12 can assume its fully extended shape.
- cam 20 repeatedly applies a force on diaphragm 12 , thereby causing diaphragm 12 to collapse as it rotates into it, and diaphragm 20 then expands back to its original position as cam 20 continues its rotation.
- Diaphragm 12 includes an inlet opening 22 on a base 23 thereof, the inlet opening being in fluid communication with an inlet passageway 24 that is in fluid communication with a container 26 holding a foamable liquid S.
- inlet passageway 24 is a tube that is submersed at one end in foamable liquid S.
- a one-way valve 28 is provided in inlet passageway 24 to permit fluid to flow into mixing chamber 14 while preventing fluid flow in the opposite direction toward reservoir 26 .
- One-way valve 28 may be any such valve known in the art, and may include, for example, a ball-valve, a duck-bill valve, a flapper valve, and the like.
- Inlet passageway 24 also includes an air inlet 30 therein that permits air to be drawn into and mixed with foamable liquid S in inlet passageway 24 , as will be appreciated from further disclosures below.
- Air inlet 30 includes a one-way valve 32 , similar to valve 28 , to prevent air or liquid from escaping from inlet passageway 24 .
- the diaphragm 12 is a well-known pump structure, and, as known, might be secured to a container to provide what is generally known as a refill unit for a dispenser housing.
- a dispenser housing that is adapted to receive a refill unit comprised of a soap or sanitizer container with a diaphragm pump secured thereto.
- a refill unit could be employed, with the diaphragm being acted upon as disclosed herein to dispense product.
- Outlet passageway 36 is in fluid communication with an outlet opening 38 in base 23 .
- Outlet passageway 36 is in the form of a tube, and terminates at opening 40 .
- a one-way valve 42 is provided in outlet passageway 36 to allow fluid flow from diaphragm 12 but to prevent fluid flow in the opposite direction.
- valve 42 may be any such valve known in the art, and may include, for example, a ball-valve, a duck-bill valve, a flapper valve, and the like.
- shaft 18 and cam 20 are rotated for a fixed period of time, as controlled by the control circuitry.
- Rotation of cam 20 causes repeated and rapid collapsing and expanding of diaphragm 12 as cam 20 rotates into and away from diaphragm 12 .
- the decreased inner volume of mixing chamber 14 generates a high pressure, which forces the contents of mixing chamber 14 out through one-way valve 42 and into outlet passageway 36 .
- the inner volume of mixing chamber 14 increases, creating a vacuum. The vacuum draws both air and foamable liquid along inlet passageway 24 and into mixing chamber 14 through one-way valve 28 .
- Air is drawn into inlet passageway 24 through a one-way valve 32 at opening 30 .
- the air is drawn into passageway 24 simply due to the movement of liquid past opening 30 , i.e., by virtue of a venturi effect.
- the venturi effect can be enhanced by restricting the flow within passageway 24 adjacent to air inlet 30 to increase the velocity of the flow, and therefore decrease pressure at the point of restricted flow.
- an air pump 34 may be employed to provide pressurized air at air inlet 30 . Air pump 34 may be controlled by control circuitry 17 of electric motor 16 , so that activation of motor 16 simultaneously causes activation of air pump 34 .
- the time period of motor actuation may be adjusted by altering control circuitry 17 to control the amount of foam that is dispensed upon each activation of foam pump 10 .
- the rate of rotation can also be altered for a given liquid/air mixture, because it may be found that different mixtures turn to foam under lesser or greater agitation.
- Outlet passageway 36 may optionally include at least one mesh screen 44 adjacent opening 40 for extrusion of the air and foamable liquid mixture prior to dispensing. It should be appreciated, however, that, in some embodiments and with some liquid and air mixtures, the mesh screen will not be needed due to the thorough mixing and agitation of the liquid and air in mixing chamber 14 .
- the at least one mesh screen 44 may be provided in the form of a mixing cartridge 46 which consists of a hollow tube 48 bounded on both ends by mesh screens 44 . Mixing cartridge 46 , if provided, may further homogenize the resulting mixture to improve the quality of foam product that is dispensed at opening 40 .
- FIG. 4 An alternative embodiment for rapidly expanding and collapsing diaphragm 12 is shown in FIG. 4 , wherein the motor 16 drives a reciprocating piston 50 to press on diaphragm 12 and permit it to return to its expanded state, much like the rotation of cam 20 .
- the reciprocation is represented by the double-headed arrow in FIG. 4 .
- the motor 16 drives a motor-driven element to rapidly collapse and expand diaphragm 12 to draw air and liquid into the mixing chamber, violently mix them within the mixing chamber, and expel them as foam out to the outlet.
Abstract
Description
- The invention herein resides in the art of foam pumps, wherein a foamable liquid and air are mixed to generate a foam product. More particularly, the invention relates to diaphragm foam pumps wherein a diaphragm is caused to repeatedly collapse and expand by a motor driven element, thereby alternately drawing foamable liquid and air into a mixing chamber within the diaphragm and forcing the mixture out as a foam product.
- For many years, it has been known to dispense liquids, such as soaps, sanitizers, cleansers, disinfectants, and the like from a dispenser housing maintaining a refill unit that holds the liquid and provides the pump mechanisms for dispensing the liquid. The pump mechanism employed with such dispensers has typically been a liquid pump, simply dispensing a predetermined quantity of the liquid upon movement of an actuator. Recently, for purposes of effectiveness and economy, it has become desirable to dispense the liquids in the form of foam generated by the interjection of air into the liquid. Accordingly, the standard liquid pump has given way to a foam generating pump, which necessarily requires means for combining the air and liquid in such a manner as to generate the desired foam.
- Typically foam dispensers generate foam by pumping a foamable liquid stream and an air stream to a mixing area and forcing the mixture through a screen to better disperse the air as bubbles within the foamable liquid and create a more uniform foam product. The more minute and numerous the air bubbles the thicker and softer the foam, although too much or too little air can cause the foam to be of poor quality. The key to a desirable foam product is violent mixing of the foamable liquid and air to disperse the air bubbles within the liquid. Many existing foam pump designs employ a piston type mechanism, which results in a fixed volume of foam generated by each activation of the foam pump, without any ability to adjust. Thus, there is a need for a foam pump providing the ability to adjust the volume of foam provided by each activation of the foam pump.
- A diaphragm foam pump including a diaphragm made of a flexible material defining a mixing chamber and having an inlet opening and an outlet opening. An inlet passageway is in fluid communication with a reservoir containing a foamable liquid and the inlet opening, with the inlet passageway having a one-way valve therein. The pump also includes an outlet passageway in fluid communication with the outlet opening and having a one-way valve therein, and an air inlet in the inlet passageway having a one-way valve. The diaphragm foam pump further includes an electric motor and a motor-driven element associated with said electric motor. Actuating the electric motor drives the motor driven element to repeatedly collapse and expand the diaphragm, and where expansion of the diaphragm creates a vacuum causing foamable liquid and air to flow into the mixing chamber, and collapsing of the diaphragm causes the liquid and air mixture to be forced out through the outlet passageway as foam.
-
FIG. 1 is a schematic of a dispenser according to the concepts of the present invention; -
FIG. 2 is a top view of the cam according toFIG. 1 ; -
FIG. 3 is a top view of an alternate cam according to another embodiment of the present invention; and -
FIG. 4 is a schematic of an alternative dispenser according to the concepts of the present invention. - A dispenser according to the concepts of the present invention is shown in
FIG. 1 and is indicated generally by thenumeral 10.Dispenser 10 includes a foam pump 11 having adiaphragm 12 that is generally dome shaped.Diaphragm 12 is made of a flexible and resilient material that collapses upon the introduction of an external force, and then returns to its original shape when the force is removed. Suitable materials include, for example, silicone, thermoplastic elastomers, and the like.Diaphragm 12 defines aninternal mixing chamber 14 therein, as will be discussed in greater detail below.Diaphragm 12 may be mounted in a dispenser housing (not shown) that provides a mounting mechanism, as well as a means for securing other components ofdispenser 10. -
Dispenser 10 also includes anelectric motor 16 having a rotatingmotor shaft 18.Electric motor 16 may be any known electric motor having a rotating shaft, including, for example, a DC motor provided with abattery power source 19.Motor 16 may includemotor drive circuitry 17 to control the activation thereof (e.g. duration, speed, etc.). Thedrive circuitry 17 ofmotor 16 may be actuated by a hands free activation sensor, as is known in the art. Acam 20 is secured to rotatingshaft 18 so that rotatingshaft 18 causes rotation ofcam 20. InFIGS. 1 and 2 ,cam 20 is shown mounted off-center onshaft 18 so that rotation ofshaft 18 is capable of generating linear force to act ondiaphragm 12, which thus functions like a cam follower. However, as seen inFIG. 3 , the cam can also be a simple center-mounted wheel with an appropriate projection, as atcam 20′. - As seen in
FIG. 1 ,motor 16 is positioned so thatshaft 18 extends adjacent todiaphragm 12, separated therefrom by a distance chosen such that, at at least one point during full rotation of shaft 18 (and thus cam 20),diaphragm 12 can assume its fully extended shape. Asshaft 18 ofmotor 16 rotates,cam 20 repeatedly applies a force ondiaphragm 12, thereby causingdiaphragm 12 to collapse as it rotates into it, anddiaphragm 20 then expands back to its original position ascam 20 continues its rotation. -
Diaphragm 12 includes an inlet opening 22 on abase 23 thereof, the inlet opening being in fluid communication with aninlet passageway 24 that is in fluid communication with acontainer 26 holding a foamable liquid S. As shown,inlet passageway 24 is a tube that is submersed at one end in foamable liquid S. A one-way valve 28 is provided ininlet passageway 24 to permit fluid to flow intomixing chamber 14 while preventing fluid flow in the opposite direction towardreservoir 26. One-way valve 28 may be any such valve known in the art, and may include, for example, a ball-valve, a duck-bill valve, a flapper valve, and the like.Inlet passageway 24 also includes anair inlet 30 therein that permits air to be drawn into and mixed with foamable liquid S ininlet passageway 24, as will be appreciated from further disclosures below.Air inlet 30 includes a one-way valve 32, similar tovalve 28, to prevent air or liquid from escaping frominlet passageway 24. - Although shown schematically to broadly disclose the concepts of this invention, it should be appreciated that the
diaphragm 12 is a well-known pump structure, and, as known, might be secured to a container to provide what is generally known as a refill unit for a dispenser housing. In the soap and sanitizer dispensing arts in particular, it is common to provide a dispenser housing that is adapted to receive a refill unit comprised of a soap or sanitizer container with a diaphragm pump secured thereto. Such a refill unit could be employed, with the diaphragm being acted upon as disclosed herein to dispense product. -
Outlet passageway 36 is in fluid communication with an outlet opening 38 inbase 23.Outlet passageway 36 is in the form of a tube, and terminates at opening 40. A one-way valve 42 is provided inoutlet passageway 36 to allow fluid flow fromdiaphragm 12 but to prevent fluid flow in the opposite direction. Like one-way valve 28,valve 42 may be any such valve known in the art, and may include, for example, a ball-valve, a duck-bill valve, a flapper valve, and the like. - Upon activation of
motor 16,shaft 18 andcam 20 are rotated for a fixed period of time, as controlled by the control circuitry. Rotation ofcam 20 causes repeated and rapid collapsing and expanding ofdiaphragm 12 ascam 20 rotates into and away fromdiaphragm 12. Eachtime diaphragm 12 is collapsed, the decreased inner volume ofmixing chamber 14 generates a high pressure, which forces the contents ofmixing chamber 14 out through one-way valve 42 and intooutlet passageway 36. Asdiaphragm 12 expands back to its original position, the inner volume ofmixing chamber 14 increases, creating a vacuum. The vacuum draws both air and foamable liquid alonginlet passageway 24 and intomixing chamber 14 through one-way valve 28. Air is drawn intoinlet passageway 24 through a one-way valve 32 at opening 30. In one embodiment, the air is drawn intopassageway 24 simply due to the movement of liquid past opening 30, i.e., by virtue of a venturi effect. As known by persons skilled in the art, the venturi effect can be enhanced by restricting the flow withinpassageway 24 adjacent toair inlet 30 to increase the velocity of the flow, and therefore decrease pressure at the point of restricted flow. Alternatively, anair pump 34 may be employed to provide pressurized air atair inlet 30.Air pump 34 may be controlled bycontrol circuitry 17 ofelectric motor 16, so that activation ofmotor 16 simultaneously causes activation ofair pump 34. - Air drawn into
inlet passageway 24 coarsely mixes with foamable liquid S. Due to the high speed rotation ofcam 20, and thus the rapid frequency of expanding and collapsing ofdiaphragm 12, the air and foamable liquid are violently agitated and more thoroughly mixed as they cycle throughmixing chamber 14. This mixture is advanced to opening 40 and dispensed as foam. The time period of motor actuation may be adjusted by alteringcontrol circuitry 17 to control the amount of foam that is dispensed upon each activation offoam pump 10. The rate of rotation can also be altered for a given liquid/air mixture, because it may be found that different mixtures turn to foam under lesser or greater agitation. -
Outlet passageway 36 may optionally include at least onemesh screen 44adjacent opening 40 for extrusion of the air and foamable liquid mixture prior to dispensing. It should be appreciated, however, that, in some embodiments and with some liquid and air mixtures, the mesh screen will not be needed due to the thorough mixing and agitation of the liquid and air in mixingchamber 14. The at least onemesh screen 44 may be provided in the form of a mixingcartridge 46 which consists of ahollow tube 48 bounded on both ends by mesh screens 44. Mixingcartridge 46, if provided, may further homogenize the resulting mixture to improve the quality of foam product that is dispensed atopening 40. - An alternative embodiment for rapidly expanding and collapsing
diaphragm 12 is shown inFIG. 4 , wherein themotor 16 drives areciprocating piston 50 to press ondiaphragm 12 and permit it to return to its expanded state, much like the rotation ofcam 20. The reciprocation is represented by the double-headed arrow inFIG. 4 . Thus, broadly, themotor 16 drives a motor-driven element to rapidly collapse and expanddiaphragm 12 to draw air and liquid into the mixing chamber, violently mix them within the mixing chamber, and expel them as foam out to the outlet. - In light of the foregoing, it should be clear that this invention provides improvements in the art of foam pumps. While a particular embodiment has been disclosed herein for the purpose of teaching the inventive concepts, it is to be appreciated that the invention is not limited to or by any particular structure shown and described. Rather, the claims shall serve to define the invention.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US12/488,146 US8172555B2 (en) | 2008-06-20 | 2009-06-19 | Diaphragm foam pump |
Applications Claiming Priority (2)
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US13266008P | 2008-06-20 | 2008-06-20 | |
US12/488,146 US8172555B2 (en) | 2008-06-20 | 2009-06-19 | Diaphragm foam pump |
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US20090317270A1 true US20090317270A1 (en) | 2009-12-24 |
US8172555B2 US8172555B2 (en) | 2012-05-08 |
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US12/488,146 Active 2030-07-15 US8172555B2 (en) | 2008-06-20 | 2009-06-19 | Diaphragm foam pump |
Country Status (15)
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US (1) | US8172555B2 (en) |
EP (1) | EP2135538B1 (en) |
JP (1) | JP2010001892A (en) |
KR (1) | KR20090132553A (en) |
CN (1) | CN101606828B (en) |
AT (1) | ATE530095T1 (en) |
AU (1) | AU2009202438B2 (en) |
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WO2013151932A1 (en) * | 2012-04-03 | 2013-10-10 | Swipesense, Inc. | Dispenser for hand sanitizer |
US9060655B2 (en) | 2012-06-13 | 2015-06-23 | Swipesense, Inc. | Dispenser for hand sanitizer |
WO2017066422A1 (en) * | 2015-10-13 | 2017-04-20 | Cooper Stephen Bradley | Wearable personal protection device including adjustable activation |
US20170135532A1 (en) * | 2015-11-18 | 2017-05-18 | Gojo Industries, Inc. | Sequentially activated multi-diaphragm foam pumps, refill units and dispenser systems |
US20170136475A1 (en) * | 2015-11-13 | 2017-05-18 | Gojo Industries, Inc. | Foaming cartridge |
US9655479B2 (en) | 2013-01-15 | 2017-05-23 | Gojo Industries, Inc. | Two-liquid dispensing systems, refills and two-liquid pumps |
US20170143172A1 (en) * | 2015-11-20 | 2017-05-25 | Gojo Industries, Inc. | Foam dispensing systems, pumps and refill units having high air to liquid ratios |
US20170156550A1 (en) * | 2015-12-04 | 2017-06-08 | Gojo Industries, Inc. | Sequentially activated multi-diaphragm foam pumps, refill units and dispenser systems |
US9943196B2 (en) | 2015-11-12 | 2018-04-17 | Gojo Industries, Inc. | Sequentially activated multi-diaphragm foam pumps, refill units and dispenser systems |
CN108591031A (en) * | 2018-05-31 | 2018-09-28 | 东莞市创点智能卫浴实业有限公司 | A kind of novel water vapor self-priming fluid mixing integral type foam pump and apply its bathroom device |
US10143339B2 (en) | 2016-04-06 | 2018-12-04 | Gojo Industries, Inc. | Sequentially activated multi-diaphragm foam pumps, refill units and dispenser systems |
US10912426B2 (en) | 2016-04-06 | 2021-02-09 | Gojo Industries, Inc. | Sequentially activated multi-diaphragm foam pumps, refill units and dispenser systems |
US11000161B2 (en) | 2016-02-11 | 2021-05-11 | Gojo Industries, Inc. | High quality non-aerosol hand sanitizing foam |
US20220241807A1 (en) * | 2021-02-03 | 2022-08-04 | Gojo Industries, Inc. | Sequentially activated multi-diaphragm foam pumps, refill units and dispenser systems having a non-uniform wobble plate |
US20220265094A1 (en) * | 2021-02-22 | 2022-08-25 | Gojo Industries, Inc. | Foam dispensers having turbine air/liquid displacement pump combination |
US11480259B2 (en) * | 2019-03-04 | 2022-10-25 | Wistron Corp. | Fluid-drive device |
US20230166277A1 (en) * | 2020-04-27 | 2023-06-01 | Kao Corporation | Foam discharge container |
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US20220241807A1 (en) * | 2021-02-03 | 2022-08-04 | Gojo Industries, Inc. | Sequentially activated multi-diaphragm foam pumps, refill units and dispenser systems having a non-uniform wobble plate |
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US20220265094A1 (en) * | 2021-02-22 | 2022-08-25 | Gojo Industries, Inc. | Foam dispensers having turbine air/liquid displacement pump combination |
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Also Published As
Publication number | Publication date |
---|---|
ATE530095T1 (en) | 2011-11-15 |
CA2669521A1 (en) | 2009-12-20 |
AU2009202438B2 (en) | 2013-06-20 |
DK2135538T3 (en) | 2012-02-06 |
PT2135538E (en) | 2012-01-06 |
MY180693A (en) | 2020-12-07 |
HK1137915A1 (en) | 2010-08-13 |
BRPI0902950A2 (en) | 2010-06-01 |
CN101606828A (en) | 2009-12-23 |
ES2374041T3 (en) | 2012-02-13 |
CN101606828B (en) | 2013-02-27 |
US8172555B2 (en) | 2012-05-08 |
TWI484099B (en) | 2015-05-11 |
KR20090132553A (en) | 2009-12-30 |
TW201000762A (en) | 2010-01-01 |
JP2010001892A (en) | 2010-01-07 |
AU2009202438A1 (en) | 2010-01-14 |
EP2135538B1 (en) | 2011-10-26 |
EP2135538A1 (en) | 2009-12-23 |
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